libpcap  1.10.1
About: libpcap is a packet filter library used by tools like tcpdump.
  Fossies Dox: libpcap-1.10.1.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

savefile.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 1993, 1994, 1995, 1996, 1997
3  * The Regents of the University of California. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that: (1) source code distributions
7  * retain the above copyright notice and this paragraph in its entirety, (2)
8  * distributions including binary code include the above copyright notice and
9  * this paragraph in its entirety in the documentation or other materials
10  * provided with the distribution, and (3) all advertising materials mentioning
11  * features or use of this software display the following acknowledgement:
12  * ``This product includes software developed by the University of California,
13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14  * the University nor the names of its contributors may be used to endorse
15  * or promote products derived from this software without specific prior
16  * written permission.
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20  *
21  * savefile.c - supports offline use of tcpdump
22  * Extraction/creation by Jeffrey Mogul, DECWRL
23  * Modified by Steve McCanne, LBL.
24  *
25  * Used to save the received packet headers, after filtering, to
26  * a file, and then read them later.
27  * The first record in the file contains saved values for the machine
28  * dependent values so we can print the dump file on any architecture.
29  */
30 
31 #ifdef HAVE_CONFIG_H
32 #include <config.h>
33 #endif
34 
35 #include <pcap-types.h>
36 #ifdef _WIN32
37 #include <io.h>
38 #include <fcntl.h>
39 #endif /* _WIN32 */
40 
41 #include <errno.h>
42 #include <memory.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <limits.h> /* for INT_MAX */
47 
48 #include "pcap-int.h"
49 
50 #ifdef HAVE_OS_PROTO_H
51 #include "os-proto.h"
52 #endif
53 
54 #include "sf-pcap.h"
55 #include "sf-pcapng.h"
56 #include "pcap-common.h"
57 #include "charconv.h"
58 
59 #ifdef _WIN32
60 /*
61  * This isn't exported on Windows, because it would only work if both
62  * WinPcap/Npcap and the code using it were to use the Universal CRT; otherwise,
63  * a FILE structure in WinPcap/Npcap and a FILE structure in the code using it
64  * could be different if they're using different versions of the C runtime.
65  *
66  * Instead, pcap/pcap.h defines it as a macro that wraps the hopen version,
67  * with the wrapper calling _fileno() and _get_osfhandle() themselves,
68  * so that it convert the appropriate CRT version's FILE structure to
69  * a HANDLE (which is OS-defined, not CRT-defined, and is part of the Win32
70  * and Win64 ABIs).
71  */
72 static pcap_t *pcap_fopen_offline_with_tstamp_precision(FILE *, u_int, char *);
73 #endif
74 
75 /*
76  * Setting O_BINARY on DOS/Windows is a bit tricky
77  */
78 #if defined(_WIN32)
79  #define SET_BINMODE(f) _setmode(_fileno(f), _O_BINARY)
80 #elif defined(MSDOS)
81  #if defined(__HIGHC__)
82  #define SET_BINMODE(f) setmode(f, O_BINARY)
83  #else
84  #define SET_BINMODE(f) setmode(fileno(f), O_BINARY)
85  #endif
86 #endif
87 
88 static int
90 {
91  /*
92  * This is a savefile, not a live capture file, so never say
93  * it's in non-blocking mode.
94  */
95  return (0);
96 }
97 
98 static int
99 sf_setnonblock(pcap_t *p, int nonblock _U_)
100 {
101  /*
102  * This is a savefile, not a live capture file, so reject
103  * requests to put it in non-blocking mode. (If it's a
104  * pipe, it could be put in non-blocking mode, but that
105  * would significantly complicate the code to read packets,
106  * as it would have to handle reading partial packets and
107  * keeping the state of the read.)
108  */
110  "Savefiles cannot be put into non-blocking mode");
111  return (-1);
112 }
113 
114 static int
115 sf_stats(pcap_t *p, struct pcap_stat *ps _U_)
116 {
118  "Statistics aren't available from savefiles");
119  return (-1);
120 }
121 
122 #ifdef _WIN32
123 static struct pcap_stat *
124 sf_stats_ex(pcap_t *p, int *size _U_)
125 {
127  "Statistics aren't available from savefiles");
128  return (NULL);
129 }
130 
131 static int
132 sf_setbuff(pcap_t *p, int dim _U_)
133 {
135  "The kernel buffer size cannot be set while reading from a file");
136  return (-1);
137 }
138 
139 static int
140 sf_setmode(pcap_t *p, int mode _U_)
141 {
143  "impossible to set mode while reading from a file");
144  return (-1);
145 }
146 
147 static int
148 sf_setmintocopy(pcap_t *p, int size _U_)
149 {
151  "The mintocopy parameter cannot be set while reading from a file");
152  return (-1);
153 }
154 
155 static HANDLE
156 sf_getevent(pcap_t *pcap)
157 {
158  (void)snprintf(pcap->errbuf, sizeof(pcap->errbuf),
159  "The read event cannot be retrieved while reading from a file");
160  return (INVALID_HANDLE_VALUE);
161 }
162 
163 static int
164 sf_oid_get_request(pcap_t *p, bpf_u_int32 oid _U_, void *data _U_,
165  size_t *lenp _U_)
166 {
168  "An OID get request cannot be performed on a file");
169  return (PCAP_ERROR);
170 }
171 
172 static int
173 sf_oid_set_request(pcap_t *p, bpf_u_int32 oid _U_, const void *data _U_,
174  size_t *lenp _U_)
175 {
177  "An OID set request cannot be performed on a file");
178  return (PCAP_ERROR);
179 }
180 
181 static u_int
182 sf_sendqueue_transmit(pcap_t *p, pcap_send_queue *queue _U_, int sync _U_)
183 {
184  pcap_strlcpy(p->errbuf, "Sending packets isn't supported on savefiles",
186  return (0);
187 }
188 
189 static int
190 sf_setuserbuffer(pcap_t *p, int size _U_)
191 {
193  "The user buffer cannot be set when reading from a file");
194  return (-1);
195 }
196 
197 static int
198 sf_live_dump(pcap_t *p, char *filename _U_, int maxsize _U_, int maxpacks _U_)
199 {
201  "Live packet dumping cannot be performed when reading from a file");
202  return (-1);
203 }
204 
205 static int
206 sf_live_dump_ended(pcap_t *p, int sync _U_)
207 {
209  "Live packet dumping cannot be performed on a pcap_open_dead pcap_t");
210  return (-1);
211 }
212 
213 static PAirpcapHandle
214 sf_get_airpcap_handle(pcap_t *pcap _U_)
215 {
216  return (NULL);
217 }
218 #endif
219 
220 static int
221 sf_inject(pcap_t *p, const void *buf _U_, int size _U_)
222 {
223  pcap_strlcpy(p->errbuf, "Sending packets isn't supported on savefiles",
225  return (-1);
226 }
227 
228 /*
229  * Set direction flag: Which packets do we accept on a forwarding
230  * single device? IN, OUT or both?
231  */
232 static int
234 {
235  snprintf(p->errbuf, sizeof(p->errbuf),
236  "Setting direction is not supported on savefiles");
237  return (-1);
238 }
239 
240 void
242 {
243  if (p->rfile != stdin)
244  (void)fclose(p->rfile);
245  if (p->buffer != NULL)
246  free(p->buffer);
247  pcap_freecode(&p->fcode);
248 }
249 
250 #ifdef _WIN32
251 /*
252  * Wrapper for fopen() and _wfopen().
253  *
254  * If we're in UTF-8 mode, map the pathname from UTF-8 to UTF-16LE and
255  * call _wfopen().
256  *
257  * If we're not, just use fopen(); that'll treat it as being in the
258  * local code page.
259  */
260 FILE *
261 charset_fopen(const char *path, const char *mode)
262 {
263  wchar_t *utf16_path;
264 #define MAX_MODE_LEN 16
265  wchar_t utf16_mode[MAX_MODE_LEN+1];
266  int i;
267  char c;
268  FILE *fp;
269  int save_errno;
270 
271  if (pcap_utf_8_mode) {
272  /*
273  * Map from UTF-8 to UTF-16LE.
274  * Fail if there are invalid characters in the input
275  * string, rather than converting them to REPLACEMENT
276  * CHARACTER; the latter is appropriate for strings
277  * to be displayed to the user, but for file names
278  * you just want the attempt to open the file to fail.
279  */
280  utf16_path = cp_to_utf_16le(CP_UTF8, path,
281  MB_ERR_INVALID_CHARS);
282  if (utf16_path == NULL) {
283  /*
284  * Error. Assume errno has been set.
285  *
286  * XXX - what about Windows errors?
287  */
288  return (NULL);
289  }
290 
291  /*
292  * Now convert the mode to UTF-16LE as well.
293  * We assume the mode is ASCII, and that
294  * it's short, so that's easy.
295  */
296  for (i = 0; (c = *mode) != '\0'; i++, mode++) {
297  if (c > 0x7F) {
298  /* Not an ASCII character; fail with EINVAL. */
299  free(utf16_path);
300  errno = EINVAL;
301  return (NULL);
302  }
303  if (i >= MAX_MODE_LEN) {
304  /* The mode string is longer than we allow. */
305  free(utf16_path);
306  errno = EINVAL;
307  return (NULL);
308  }
309  utf16_mode[i] = c;
310  }
311  utf16_mode[i] = '\0';
312 
313  /*
314  * OK, we have UTF-16LE strings; hand them to
315  * _wfopen().
316  */
317  fp = _wfopen(utf16_path, utf16_mode);
318 
319  /*
320  * Make sure freeing the UTF-16LE string doesn't
321  * overwrite the error code we got from _wfopen().
322  */
323  save_errno = errno;
324  free(utf16_path);
325  errno = save_errno;
326 
327  return (fp);
328  } else {
329  /*
330  * This takes strings in the local code page as an
331  * argument.
332  */
333  return (fopen(path, mode));
334  }
335 }
336 #endif
337 
338 pcap_t *
339 pcap_open_offline_with_tstamp_precision(const char *fname, u_int precision,
340  char *errbuf)
341 {
342  FILE *fp;
343  pcap_t *p;
344 
345  if (fname == NULL) {
346  snprintf(errbuf, PCAP_ERRBUF_SIZE,
347  "A null pointer was supplied as the file name");
348  return (NULL);
349  }
350  if (fname[0] == '-' && fname[1] == '\0')
351  {
352  fp = stdin;
353  if (stdin == NULL) {
354  snprintf(errbuf, PCAP_ERRBUF_SIZE,
355  "The standard input is not open");
356  return (NULL);
357  }
358 #if defined(_WIN32) || defined(MSDOS)
359  /*
360  * We're reading from the standard input, so put it in binary
361  * mode, as savefiles are binary files.
362  */
363  SET_BINMODE(fp);
364 #endif
365  }
366  else {
367  /*
368  * Use charset_fopen(); on Windows, it tests whether we're
369  * in "local code page" or "UTF-8" mode, and treats the
370  * pathname appropriately, and on other platforms, it just
371  * wraps fopen().
372  *
373  * "b" is supported as of C90, so *all* UN*Xes should
374  * support it, even though it does nothing. For MS-DOS,
375  * we again need it.
376  */
377  fp = charset_fopen(fname, "rb");
378  if (fp == NULL) {
380  errno, "%s", fname);
381  return (NULL);
382  }
383  }
384  p = pcap_fopen_offline_with_tstamp_precision(fp, precision, errbuf);
385  if (p == NULL) {
386  if (fp != stdin)
387  fclose(fp);
388  }
389  return (p);
390 }
391 
392 pcap_t *
393 pcap_open_offline(const char *fname, char *errbuf)
394 {
396  PCAP_TSTAMP_PRECISION_MICRO, errbuf));
397 }
398 
399 #ifdef _WIN32
400 pcap_t* pcap_hopen_offline_with_tstamp_precision(intptr_t osfd, u_int precision,
401  char *errbuf)
402 {
403  int fd;
404  FILE *file;
405 
406  fd = _open_osfhandle(osfd, _O_RDONLY);
407  if ( fd < 0 )
408  {
410  errno, "_open_osfhandle");
411  return NULL;
412  }
413 
414  file = _fdopen(fd, "rb");
415  if ( file == NULL )
416  {
418  errno, "_fdopen");
419  _close(fd);
420  return NULL;
421  }
422 
423  return pcap_fopen_offline_with_tstamp_precision(file, precision,
424  errbuf);
425 }
426 
427 pcap_t* pcap_hopen_offline(intptr_t osfd, char *errbuf)
428 {
429  return pcap_hopen_offline_with_tstamp_precision(osfd,
431 }
432 #endif
433 
434 /*
435  * Given a link-layer header type and snapshot length, return a
436  * snapshot length to use when reading the file; it's guaranteed
437  * to be > 0 and <= INT_MAX.
438  *
439  * XXX - the only reason why we limit it to <= INT_MAX is so that
440  * it fits in p->snapshot, and the only reason that p->snapshot is
441  * signed is that pcap_snapshot() returns an int, not an unsigned int.
442  */
445 {
446  if (snaplen == 0 || snaplen > INT_MAX) {
447  /*
448  * Bogus snapshot length; use the maximum for this
449  * link-layer type as a fallback.
450  *
451  * XXX - we don't clamp snapshot lengths that are
452  * <= INT_MAX but > max_snaplen_for_dlt(linktype),
453  * so a capture file could cause us to allocate
454  * a Really Big Buffer.
455  */
456  snaplen = max_snaplen_for_dlt(linktype);
457  }
458  return snaplen;
459 }
460 
461 static pcap_t *(*check_headers[])(const uint8_t *, FILE *, u_int, char *, int *) = {
464 };
465 
466 #define N_FILE_TYPES (sizeof check_headers / sizeof check_headers[0])
467 
468 #ifdef _WIN32
469 static
470 #endif
471 pcap_t *
473  char *errbuf)
474 {
475  register pcap_t *p;
476  uint8_t magic[4];
477  size_t amt_read;
478  u_int i;
479  int err;
480 
481  /*
482  * Fail if we were passed a NULL fp.
483  *
484  * That shouldn't happen if we're opening with a path name, but
485  * it could happen if buggy code is opening with a FILE * and
486  * didn't bother to make sure the FILE * isn't null.
487  */
488  if (fp == NULL) {
489  snprintf(errbuf, PCAP_ERRBUF_SIZE,
490  "Null FILE * pointer provided to savefile open routine");
491  return (NULL);
492  }
493 
494  /*
495  * Read the first 4 bytes of the file; the network analyzer dump
496  * file formats we support (pcap and pcapng), and several other
497  * formats we might support in the future (such as snoop, DOS and
498  * Windows Sniffer, and Microsoft Network Monitor) all have magic
499  * numbers that are unique in their first 4 bytes.
500  */
501  amt_read = fread(&magic, 1, sizeof(magic), fp);
502  if (amt_read != sizeof(magic)) {
503  if (ferror(fp)) {
505  errno, "error reading dump file");
506  } else {
507  snprintf(errbuf, PCAP_ERRBUF_SIZE,
508  "truncated dump file; tried to read %zu file header bytes, only got %zu",
509  sizeof(magic), amt_read);
510  }
511  return (NULL);
512  }
513 
514  /*
515  * Try all file types.
516  */
517  for (i = 0; i < N_FILE_TYPES; i++) {
518  p = (*check_headers[i])(magic, fp, precision, errbuf, &err);
519  if (p != NULL) {
520  /* Yup, that's it. */
521  goto found;
522  }
523  if (err) {
524  /*
525  * Error trying to read the header.
526  */
527  return (NULL);
528  }
529  }
530 
531  /*
532  * Well, who knows what this mess is....
533  */
534  snprintf(errbuf, PCAP_ERRBUF_SIZE, "unknown file format");
535  return (NULL);
536 
537 found:
538  p->rfile = fp;
539 
540  /* Padding only needed for live capture fcode */
541  p->fddipad = 0;
542 
543 #if !defined(_WIN32) && !defined(MSDOS)
544  /*
545  * You can do "select()" and "poll()" on plain files on most
546  * platforms, and should be able to do so on pipes.
547  *
548  * You can't do "select()" on anything other than sockets in
549  * Windows, so, on Win32 systems, we don't have "selectable_fd".
550  */
551  p->selectable_fd = fileno(fp);
552 #endif
553 
555  p->inject_op = sf_inject;
558  p->set_datalink_op = NULL; /* we don't support munging link-layer headers */
561  p->stats_op = sf_stats;
562 #ifdef _WIN32
563  p->stats_ex_op = sf_stats_ex;
564  p->setbuff_op = sf_setbuff;
565  p->setmode_op = sf_setmode;
566  p->setmintocopy_op = sf_setmintocopy;
567  p->getevent_op = sf_getevent;
568  p->oid_get_request_op = sf_oid_get_request;
569  p->oid_set_request_op = sf_oid_set_request;
570  p->sendqueue_transmit_op = sf_sendqueue_transmit;
571  p->setuserbuffer_op = sf_setuserbuffer;
572  p->live_dump_op = sf_live_dump;
573  p->live_dump_ended_op = sf_live_dump_ended;
574  p->get_airpcap_handle_op = sf_get_airpcap_handle;
575 #endif
576 
577  /*
578  * For offline captures, the standard one-shot callback can
579  * be used for pcap_next()/pcap_next_ex().
580  */
582 
583  /*
584  * Default breakloop operation.
585  */
587 
588  /*
589  * Savefiles never require special BPF code generation.
590  */
591  p->bpf_codegen_flags = 0;
592 
593  p->activated = 1;
594 
595  return (p);
596 }
597 
598 /*
599  * This isn't needed on Windows; we #define pcap_fopen_offline() as
600  * a wrapper around pcap_hopen_offline(), and we don't call it from
601  * inside this file, so it's unused.
602  */
603 #ifndef _WIN32
604 pcap_t *
605 pcap_fopen_offline(FILE *fp, char *errbuf)
606 {
608  PCAP_TSTAMP_PRECISION_MICRO, errbuf));
609 }
610 #endif
611 
612 /*
613  * Read packets from a capture file, and call the callback for each
614  * packet.
615  * If cnt > 0, return after 'cnt' packets, otherwise continue until eof.
616  */
617 int
618 pcap_offline_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
619 {
620  struct bpf_insn *fcode;
621  int status = 0;
622  int n = 0;
623  u_char *data;
624 
625  while (status == 0) {
626  struct pcap_pkthdr h;
627 
628  /*
629  * Has "pcap_breakloop()" been called?
630  * If so, return immediately - if we haven't read any
631  * packets, clear the flag and return -2 to indicate
632  * that we were told to break out of the loop, otherwise
633  * leave the flag set, so that the *next* call will break
634  * out of the loop without having read any packets, and
635  * return the number of packets we've processed so far.
636  */
637  if (p->break_loop) {
638  if (n == 0) {
639  p->break_loop = 0;
640  return (-2);
641  } else
642  return (n);
643  }
644 
645  status = p->next_packet_op(p, &h, &data);
646  if (status) {
647  if (status == 1)
648  return (0);
649  return (status);
650  }
651 
652  if ((fcode = p->fcode.bf_insns) == NULL ||
653  pcap_filter(fcode, data, h.len, h.caplen)) {
654  (*callback)(user, &h, data);
655  if (++n >= cnt && cnt > 0)
656  break;
657  }
658  }
659  /*XXX this breaks semantics tcpslice expects */
660  return (n);
661 }
u_int bpf_u_int32
Definition: bpf.h:98
u_int pcap_filter(const struct bpf_insn *pc, const u_char *p, u_int wirelen, u_int buflen)
Definition: bpf_filter.c:391
void pcap_fmt_errmsg_for_errno(char *errbuf, size_t errbuflen, int errnum, const char *fmt,...)
Definition: fmtutils.c:269
void pcap_freecode(struct bpf_program *program)
Definition: gencode.c:900
int install_bpf_program(pcap_t *p, struct bpf_program *fp)
Definition: optimize.c:2939
int snprintf(char *, size_t, const char *,...)
void sync(void)
u_int max_snaplen_for_dlt(int dlt)
Definition: pcap-common.c:1377
#define _U_
Definition: pcap-dos.h:93
int errno
void pcap_breakloop_common(pcap_t *)
Definition: pcap.c:3980
int pcap_utf_8_mode
Definition: pcap.c:241
void pcap_oneshot(u_char *, const struct pcap_pkthdr *, const u_char *)
Definition: pcap.c:579
#define charset_fopen(path, mode)
Definition: pcap-int.h:572
void(* pcap_handler)(u_char *, const struct pcap_pkthdr *, const u_char *)
Definition: pcap.h:330
#define PCAP_TSTAMP_PRECISION_MICRO
Definition: pcap.h:511
pcap_direction_t
Definition: pcap.h:227
#define PCAP_ERRBUF_SIZE
Definition: pcap.h:152
#define PCAP_ERROR
Definition: pcap.h:339
void sf_cleanup(pcap_t *p)
Definition: savefile.c:241
static int sf_setdirection(pcap_t *p, pcap_direction_t d)
Definition: savefile.c:233
static int sf_setnonblock(pcap_t *p, int nonblock)
Definition: savefile.c:99
bpf_u_int32 pcap_adjust_snapshot(bpf_u_int32 linktype, bpf_u_int32 snaplen)
Definition: savefile.c:444
static int sf_stats(pcap_t *p, struct pcap_stat *ps)
Definition: savefile.c:115
#define N_FILE_TYPES
Definition: savefile.c:466
int pcap_offline_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
Definition: savefile.c:618
pcap_t * pcap_open_offline_with_tstamp_precision(const char *fname, u_int precision, char *errbuf)
Definition: savefile.c:339
static int sf_getnonblock(pcap_t *p)
Definition: savefile.c:89
pcap_t * pcap_open_offline(const char *fname, char *errbuf)
Definition: savefile.c:393
pcap_t * pcap_fopen_offline(FILE *fp, char *errbuf)
Definition: savefile.c:605
pcap_t * pcap_fopen_offline_with_tstamp_precision(FILE *fp, u_int precision, char *errbuf)
Definition: savefile.c:472
static int sf_inject(pcap_t *p, const void *buf, int size)
Definition: savefile.c:221
static pcap_t *(* check_headers[])(const uint8_t *, FILE *, u_int, char *, int *)
Definition: savefile.c:461
pcap_t * pcap_check_header(const uint8_t *magic, FILE *fp, u_int precision, char *errbuf, int *err)
Definition: sf-pcap.c:153
pcap_t * pcap_ng_check_header(const uint8_t *magic, FILE *fp, u_int precision, char *errbuf, int *err)
Definition: sf-pcapng.c:769
size_t pcap_strlcpy(char *restrict dst, const char *restrict src, size_t dsize)
Definition: strlcpy.c:34
Definition: bpf.h:245
struct bpf_insn * bf_insns
Definition: bpf.h:119
bpf_u_int32 caplen
Definition: pcap.h:247
bpf_u_int32 len
Definition: pcap.h:248
Definition: pcap-int.h:200
stats_op_t stats_op
Definition: pcap-int.h:320
setnonblock_op_t setnonblock_op
Definition: pcap-int.h:319
int bpf_codegen_flags
Definition: pcap-int.h:271
setfilter_op_t setfilter_op
Definition: pcap-int.h:315
sig_atomic_t break_loop
Definition: pcap-int.h:225
pcap_handler oneshot_callback
Definition: pcap-int.h:326
u_int fddipad
Definition: pcap-int.h:235
getnonblock_op_t getnonblock_op
Definition: pcap-int.h:318
read_op_t read_op
Definition: pcap-int.h:204
void * buffer
Definition: pcap-int.h:221
next_packet_op_t next_packet_op
Definition: pcap-int.h:209
setdirection_op_t setdirection_op
Definition: pcap-int.h:316
inject_op_t inject_op
Definition: pcap-int.h:313
struct bpf_program fcode
Definition: pcap-int.h:293
breakloop_op_t breakloop_op
Definition: pcap-int.h:321
set_datalink_op_t set_datalink_op
Definition: pcap-int.h:317
char errbuf[256+1]
Definition: pcap-int.h:295
int selectable_fd
Definition: pcap-int.h:274
int activated
Definition: pcap-int.h:251
FILE * rfile
Definition: pcap-int.h:234